Thread interrupt not ending blocking call on input stream read

Question

I\'m using RXTX to read data from a serial port. The reading is done within a thread spawned in the following manner:

CommPortIdentifier portIdentifier = Co         


        

Answer 1

i am using the code below to shutdown rxtx. i run tests that start them up and shut them down and the seems to work ok. my reader looks like:

private void addPartsToQueue(final InputStream inputStream) {
    byte[] buffer = new byte[1024];
    int len = -1;
    boolean first = true;
    // the read can throw
    try {
        while ((len = inputStream.read(buffer)) > -1) {
            if (len > 0) {
                if (first) {
                    first = false;
                    t0 = System.currentTimeMillis();
                } else
                    t1 = System.currentTimeMillis();
                final String part = new String(new String(buffer, 0, len));
                queue.add(part);
                //System.out.println(part + " " + (t1 - t0));
            }
            try {
                Thread.sleep(sleep);
            } catch (InterruptedException e) {
                //System.out.println(Thread.currentThread().getName() + " interrupted " + e);
                break;
            }
        }
    } catch (IOException e) {
        System.err.println(Thread.currentThread().getName() + " " + e);
        //if(interruSystem.err.println(e);
        e.printStackTrace();
    }
    //System.out.println(Thread.currentThread().getName() + " is ending.");
}

thanks

public void shutdown(final Device device) {
    shutdown(serialReaderThread);
    shutdown(messageAssemblerThread);
    serialPort.close();
    if (device != null)
        device.setSerialPort(null);
}

public static void shutdown(final Thread thread) {
    if (thread != null) {
        //System.out.println("before intterupt() on thread " + thread.getName() + ", it's state is " + thread.getState());
        thread.interrupt();
        //System.out.println("after intterupt() on thread " + thread.getName() + ", it's state is " + thread.getState());
        try {
            Thread.sleep(100);
        } catch (InterruptedException e) {
            System.out.println(Thread.currentThread().getName() + " was interrupted trying to sleep after interrupting" + thread.getName() + " " + e);
        }
        //System.out.println("before join() on thread " + thread.getName() + ", it's state is " + thread.getState());
        try {
            thread.join();
        } catch (InterruptedException e) {
            System.out.println(Thread.currentThread().getName() + " join interruped");
        }
        //System.out.println(Thread.currentThread().getName() + " after join() on thread " + thread.getName() + ", it's state is" + thread.getState());
    }